1. Coffins

Most people probably don't realize that Costco has an entire funeral category, selling coffins in most states. Beyond caskets, which cost between $949.99 and $2,999.99, the company also sells a variety of urns.

Costco's coffins, sold in partnership with Universal Casket Co., are very well reviewed.

"This purchase took much pressure off the difficult time of dealing with Mom's funeral," reads a review of the solid five-star rated Mother Casket. "She would have loved it, and it was her wish to do this... Funeral costs are very high, and this product and the people we dealt with were caring and professional."

3. Engagement rings

If you're shopping for an engagement ring at Costco, you can choose to spend a lot, with options costing up to $19,999.99. There are also rings on the less expensive side, such as one choice that clocks in at $779.99.

4. Wagyu beef

Our Authentic Wagyu Striploin is artfully marbled, with delicate, yet explosive flavor. Our Striploin is taken from the center of the beef loin, which generates a feeling in your mouth that is one of a kind. As you enjoy each bite, you will experience wonderful waves of buttery, sweet, beefy flavor.

If you have never tasted an imported A5 Wagyu steak from the farms of Japan, the experience can be next to impossible to describe. The one description beef connoisseurs the world over can agree upon is your opinion as to what a steak should taste like, will be changed forever.

According to customers, the beef is worth the investment, with an average of 4.9 out of five stars.

"This beef blew my expectations OUT OF THE WATER," reads one five star review. "I consider myself somewhat of a foodie, and this honestly was one of the best experiences my guests and I have ever enjoyed."

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5. Cars

Reuters

Costco has a booming auto business, selling 465,000 vehicles through partnerships with auto dealers in 2015, a 16.8% increase from the previous year.

The retailer has one major perk that traditional car dealerships lack: fixed prices. That means customers can skip the bargaining and upselling that is expected at traditional auto dealers.

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6. Trips to theme parks

You can find bargains on theme parks, including Walt Disney World, Universal Orlando, Disneyland, and other Disney-guided vacations through Costco. The deals typically combine park tickets with vacation necessities, such as rental cars and hotel rooms.

7. Pizza

Everyone knows that Costco has a food court, but few realize just how powerful a force the retailer is in the pizza business.

With 703 domestic locations, the vast majority of which have food courts, the retailer is the 14th largest pizza chain in the country. Costco is a bigger pizza chain than California Pizza Kitchen and nearly as big as CiCis — at least when it comes to sheer size.

This isn't the only part of the food industry where Costco has a huge impact, though. The chain serves more than four times as many hot dogs a year than all the Major League Baseball ballparks combined.